Dumping gear



Allg 4, 1931. E. J. DONDLINGER 1,817,132

DUMPING- GEAR Filed Nov. 12, 1928 4 Sheets-Sheet l v Aug. 4, 1931.

7p/Mi@ E. J. DONDLINGER DUMPING GEAR Filed NOV. l2. 1928 4 Sheets-Sheet 2 Gf?? ve 72 fA Eugene I maziger Aug- 4, 1931, E; J. DONDLJNGER `1,817,132

DUMPING GEAR Filed Nov. l2, 1928 4 Sheets-Sheet 3 DUMPING GEAR Filed Nov. l2, 1928 4 Sheets-Sheet 4 iff/4655,

needs to be supported.

sa sra 'EUG-ENE J. DGNBLINGER, 0F GHCAGO, ILL-NOS Application filed November 12, 1928.

This invention relates to a dumping gear for trucks and the like. The invention is particularly applica-ble to use .in dumping vehicle bodies, but l do not intend to limit the invention to such use only.

It is well known that, .in tilting a dumping body, the greatest power is required upon the initial lifting of the body to start the dumping operation and the greatest f strain upon Ythe mechanism comes at this time. As the body is tilted up, the power required 'becomes less until the point is reached wher the material is all dumped from the body and merely the empty body As the body is raised, 'the weight is ybalanced more ant moreover the hinge or pivot for the body or placed more and more upon this hinge or pivot until fully raised or tilted position 'is reached, in which position the fbody is substantially balanced over the hinge or pivot therefor, 4or at least the mayor portion of the weight 1s placed upon the ybody hinge or pivot yat this time.

lss.

According to my present invention, l provide simple and effective means for securing maximum power or leve-rage for the initial o1 eration of lifting and I decrease the power or leverage and increase the speed of operation as lthe body rises and the load l use of a rocker arm or rocker means, which gradually shifts the application of the lifting effort or power rearwardly or toward the body hinge or pivot as the body rises. As the lifting effort is applied with the body inhorizontal position, the rocker arm :applies this effort through a maximum leverage or farthest from the body hinge 'or pivot and, as the body rises, the rocker arm shifts the application of the lifting Veffort toward the body hinge or pivot. This decreases the leverage of application to provide :a more uniform application of theY lifting force, that is, a more uniform ratio between the lifting force and the weight of the .load against which said force acts and., at the Serial No. 313,723.

same time, the speed of the tilting movenent of the body increases as the :power -or orage of ,power application deceases. 'ins increases the speed of the dumping opration. The rocker arm is actuated 'by a straight rack, as distinguished from the curved rack and application of the vlifting effort `to the same point on the vbody throughout the tilting or dumping range, as resorted to heretofore in ythe art.

For the purpose of locating the rocker Ion he body and holding the body from going giacl; over rearwardly at the upper limit of the dumping operation, keeper means is preferably provided ven 'the body, although it is contemplated that this means may be varied, or even omitted, within the scope of the present invention. The lrocker arm and body are also preferably provided with complementary spaced projections 'and recesses, which are adapted to be successively engaged. `.or intefrlocked to keep the parts properly correlated and .particularly iat the proper angle. By the use of the :rocker means employed and -the shifting of the lifting effort toward the hinge `or pivot of the body on the vehicle frame, a greater dumping 'angle is also vobtained with a rack or strut fof less length.

The fundamental feature of novelty is the employment of a rocker arm or rocker means which, 'although preferably -integral with the rack, could Kbe made separate therefrom, and the shifting of the application of the lifting effort or power toward the body hinge -or .pivot thereby. Another feature is in the use of a straight rack and the increased dumping angle obtained with a straight rack of less length by the use of the rocker means referred to. Another feature is in the 'keeper means for locating the rocker on the 'body and for holding' the body from going back over rearwardly the upper limit of the dumping operation and another feature is yin the cooperating projections 'and recesses on the body and rocker means for keeping the parts properly 'correlated and at the proper. angle.

The manner of operation of 'the straight rack serves merely to transmit Vthe lifting Cil effort or power to the rocker means and the manner of operation of this rack enables it to work down through and below the vehicle frame and it may be readily arranged so as to not conflict with other requirements of the frame.

In order to acquaint those'skilled in the art with the manner of constructing and practicing the present invention, I shall now describe a particular embodiment of the invention in connection with the accompanying drawings, in which:

Figure 1 is a side elevational view of a motor dumping truck, showing an embodiment of the present invention in connection therewith Figure 2 is an enlarged fragmentary side elevational View, showing the gear train of the truck body of Figure 1, with parts brokenV away to more clearly reveal the dumping gear ofthe present invention;

` Figure 3 is a fragmentary transverse section, taken substantially on the line 3-3 of Figure 2;

Figure 4 is an enlarged fragmentary side elevational view,Y showing the gear train and straight rack means for imparting the lifting effort or power to the rocker means of the dumping gear; and

Figure 5 is a fragmentary top plan view.

The vehicle or truck selected for illustration has the usual or any suitable running gear, including the wheels 1, and is provided with the usual or any suitable frame, which includes the sills or longitudinal side frame members 2. This frame preferably, thoughy not necessarily comprises a part of the chassis of the vehicle. A separate frame might be provided and such a separate frame could be secured on the chassis. The dumping body 3 is pivoted or hinged at 4 to the frame members 2 as well understood by those skilled in the art. This dumping body 3 preferably has a sub-frame 5 andthe body 3 may be'mounted upon this sub-frame 5, as by means of the cross-beams 6, although this is all immaterial and may be varied widely within the scope of the present invention.

Underlying the bottom 7 of the body 3 are a pair of rocker arms 8. These rocker arms 8 are disposed longitudinally of the body 3, one beneath each of the opposite sides opening channels 9.

of the body, as shown in Figure'3. For holding the body 3 against lateral displacement from thelrocker arms 8, as for eX- ample, where the vehicle is on a steep lateral grade, the bottom of the body 3 is preferably provided with a pair of downwardly The bases of these channels 9 are suitably secured at 10 to the bottom of the body 3 and their cross-sections are proportioned to individually receive the rocker arms 8, the depending side flanges of the channels 9 providing suitable lateral retention for preventing the lateral displacement above referred to.

The lower marginal edges of the side flanges of the channels 9 are preferably turned or flared out slightly, as indicated at 11. The upper surfaces12 of the rocker arms 8 are preferably rounded, as shown, to provide the desired rocker action upon the bottom of the body 3. In order to keep the rocker arms 8 properly correlated and at the proper angle with respect to the bottom of the body 3, the upper rounded surfaces 12 of these arms 8 are preferably provided with spaced protuberances 14 for successive engagement in complementary recesses or sockets 15. The recesses 15 are shown as formed in the upper bases of the channels 9, which bases may be provided internally of the channels with suitable strips 16 having registering recesses for giving the recesses 15 the desired depth, so that the protuberances or teats 14 may properly engage therein without projecting from the recesses or into engagement with the bottom wall of the body overlying said recesses. The protuberances 14 are preferably tapered, as shown, to properly engage and interlock with the recesses 15 in the rocking action of the arms 8 upon the bottom of the body 3.

Each of the rockers 8 is provided withy a straight rack 20. In the illustrated embodiment, one of the straight racks 2O is shown as being formed integral with each of the rockers 8, but it is to be understood that the racks may be formed separately from the rockers and joined or otherwise operatively connected therewith.

The straight formation of these racks 2O simplifies the formation of the rack teeth andthe greater dumping angle provided by the rocking action of the rockers 8 permits these racks 2O to depend down substantially vertically, Vwithout interfering. with road clearance requirements, because with the present invention the greater dumping angle is obtained with a rack of less length.

Each rack 20 meshes with one of a ,pair of pinions 21, suitably secured upon the opposite ends of a transverse shaft :22 for rotation therewith. Shaft 22 is journalled at 24 and 25 in suitable bearings, which may be formed integral with a'saddle frame or bracket 26, extending transversely across the vehicle frame members 2 and suitably supported at its opposite ends at 27 and 28 thereon, it being understood that these ends 27 and 28 may be bolted or otherwise suitably secured to the frame members 2. A gear 30, also fixed upon the shaft 22 to turn therewith, meshes with a smaller pinion 32, suitably journalled upon a short shaft The pinion 32 is shown as having an integral extension neck or hub 34 to which is secured, as by bolts 35, a worm `wheel 36 which, upon rot-ation, rotates the pinion 32 therewith. Vorm wheel 36 meshes kwith a worm 37 igures 3 and 4). Worm 37 kis splined upon, or otherwise connected, to turn with 'a shaft 38, which shaft 38 is, in turn, drivingly connected through a univer joint 39 and extension shaft 40, with .any suitable power 'takeoff from the vehicle transmission or other motor driven part, where the fd-urnping gear is applied to a motor truck. o

In Figure l, the power take-off conifre-.tion to the extension shaft 40 is shown bemg from the change speed transmission 42 to the forward end of the shaft 40, but this may vary. The forward end of shaft 40 is shown as 'being connected with the transmission 42 through a universal driving connection Worm l37, worm wheel 36, pinion 32 and spur gear-30 constitute a reduction gearing between the rearward end of the shaft 40 and the ytransverse hoist shaft 22 and this gearing is preferably enclosed within a suitable case or housing 45 preferably formed integral with the bracket or fram-e 26. The top of the case 45 is provided with a removable lcover 46, which may be ured in place by cap screws 47 and the of the fcase 45 :beneath the worin 37 is provided with a removable drain .plug The bearings 24 and 25 are, preferably, provided` with bear-ing sleeves 49., which may be of brass, Abronze -or other :suitable material and suitable openings 50 are provided for hibricating these bearings. Shaft 33 is journa'lled at its opposite `ends in the case 45, which may be provided with suitable oil seal pockets 5l. Case 45 may be split at 52 to permit removal of the bottom portion of the case.

Shaft 3S is journalled .at its opposite ends in bearing members 54, having inwardly projecting hub portions 55 and annular flanges 56 secured around coaxial openings 57 in case 5, as by means of cap screws 57.

A disc 58 suitably secured in the rearward bearing member 54 seals the passage therethrough rearwardly and a plate 59, secured to the forward bearing member 54, is provided with an opening permitting the extension of the shaft 38 and this plate 59 tends to seal the forward bearing member forwardly. Bearing sleeves 60 are provided within the bearings 54 and suitable rings 6l are interposed between the opposite ends of the worm 37 and the respective bearings 54.

For vthe purpose of locating the rocker arms 8 'on the body 3 and for holding the body from going back over rearwardly at the upper limit of the dumping operation, each of the rocker arms k8 is provided with a keeper opening or pocket and the body 3 is provided with a pair of lateral pins 66, one engaging in each of the keepers 65.

The upper portion of the keeper pocket 65, as viewed in Figure 2, has a pair of depressions 67 and 68 separated by a depending projection 69. In the normal horizontal position of the body 3 as shown in full lines in Figure 2, the pins 66 are positioned in the depressions 67 substantially as shown in Figure 2 and, as the body tilts upwardly, the pins 66 travel through the paths indicated `by the arrows 70 (Figure 2) to position in the depressions 68, as indicated in the dotted line tilted position in Figure 2. Suitable guide rollers 72 may be journalled at 73 upon the bracket or frame 26 for cooperation with the adjacent edges of the rack bars 20. The shoulders 75 on the frame 26, adjacent the racks 20, form stops for limiting or preventing transverse inward displacement of rthe racks 20.

The operation of the device is as follows:

Normally, when the body 3 is lying flat or horizontally upon the frame 2, the straight rack arms or struts 20 extend downwardly below the frame 2 and tangentially with respect to the meshing pinions 2l. As power plied to the cross shaft 22 through the take-off, extension shaft 40, worm worm wheel 36, pinion 32 and gear the rotation of the pinions 2l moves the rack bars 2O upwardly from their normal full line positions toward the positions shown in dotted lines in Figure 2, which dotted line positions are reached at the limit of tl e tilting or dumping movement of the body. lVith the body in hori- Zontal position, the forwardmost projections 14 of the rocker arms 8 are engaged in recesses l5 on the bottom of the body and the ini-tial lifting effort or power is applied to the bottom of the -body through the forward ends of the rockers S at substantially the points S0 in Figure 2. As the body rises, the rearwardly spaced projections are successively engaged with the rearwardly spaced recesses or openings l5 and the application of the lifting effort or power is gradually shifted rearwardly along the upper surfaces of the rockers S to substantially the points S2 at the limit of the tilting movement. The relatively great leverage or radii from the hinges or pivots 4 to the points of power application 8O imposes great initial power to take up the load where its effect and strain on the dumping gear is greatest.

Then, as the body and load rise, the shifting of the application of the lifting effort rearwardly gradually decreases the leverage or radii from the hinge or pivot 4 to the point of application of the lifting effort. This decreases the power as the body rises and the load becomes lighter and, at the same time, the speed of the tilting movement of the body increases as the power or leverage o f power application decreases.

A more uniform application of the lifting force, that is, a more uniform ratio between the lifting force and the weight of the load against which the force operates is obtained 5. and the speed of the dumping operation is increased. In addition, the decrease inthe leverage and the relatively small radius of application toward the limit of the dumping or tilting movement of the body provides a oi'elatively great dumping or tilting` movement with a relatively slight movement of the straight rack bar 20. In this manner, a greater dumping angle may be obtained with 1^a rack or strut of less length and the rack 2() may depend substantially vertically below the vehicle frame 2 and, at the same time, provide the desired dumping angle, without necessitating making the rack of such a length as to interfere with adequate 20V"road clearance requirements.

properly correlated and keeps the rocker 0 :and rackarins at the proper angles.

The keeper means 65, 66 holds the body from going over backward or rearwardly at the limit of the tilting or dumping opera-- .,-tion and this keeper means holds the rocker arms in position when the body is down.

For the purpose of returning the body to its normal horizontal position, the take-off means is reversed inV any suitable or pre- .ferred manner, as Well understood in the art.

o This rotates the cross shaft 22 in the opposite direction and the pinions 21 thereupon drive the racks 2() downwardly from the tilted position to the normal horizontal position, as shown in full lines in Figure 2. Obviously, as the body is returned to its hor" izontal position, the rocker arms 8 gradually shift trie effective point of the load thereon forwardly. At the same time, the pins 66 return in the direction of the arrow 86 in Figure 2 to the depressions 67.

The device may be provided-with suitable means for discontinuing the power application at the upper and lower limits of move- .ment of the tilting body 3. Vhile this means may be varied widely, the illustrated mechanism for this purpose comprises a trip arm 90 pivoted at 91 upon the bracket or frame member 26, for example. The depending arm 92 of the trip arm 90 is con nected at 93 with a rod or other suitable longitudinal extension 94, which is connected at its forward end with suitable means 95 illustrated more or less diagram'- matically' in Figure 1,`for disconnecting the power application to the extension shaft 40 by the longitudinal shifting movement of the rod 94 in either direction.

The other arm 96 of the trip member 90 is arched under the adjacent pinion 21 and is turned out at its free ends at 97 for cooperation with a cross web or abutment 98 on the rack bar 20. The cross web or abutment 98 is adjacent the upper end of the rack bar 2O and adjacent its lower end this bar has a second cross web'or abutment 99 also cooperable with the projection 97 on the arm 96. y y

The power disconnecting means 95 may be of any existing or other suitable type, well understood in the art, and it is not believed that a detailed disclosure of the same is necessary here. Suffice it to say that, as the body is tilted upwardly, the lower abutment 99 approaches the projection 97 and, at the limit of the upward tilting movement, engages this projection 97 and swings the arm 90 about its pivot 91, which shifts the rod or connection 94 rearwardly and cuts off or disconnects the power application to the dumping gear. As the body 3 is returned to a horizontal position, the abutment engages the projection 97 at the limit of the downward movement and this again swings the arm 90 about the pivot 91, which shifts the rod 94 forwardly and again disconnects or discontinues the power application to the dumping gear. Itis understood, of course, that the application of the power to the dumping gear is controlled from the drivers seat, as by means of a suitable lever indicated more or less diagrammatically at- 100 in Figure 1.

With the body in horizontal position, the power from the vehicle is connected vwith the dumping gear by appropriately shifting the lever 100 and, after the power hasv been automatically disconnected at the limit of the upward tilting movement of the body, it may be again connected with the dumping gear to return the body to its horizontal position by again shifting the lever7100. The engine or power plant of the particular truck illustrated is indicated at. 102 andthe change speed transmission from which the dumping gear power take-off is connected is indicated at 103.

I do not intend to be limited to the details shown or described. I claim: v Y

1. In combination, a frame, a platform pivoted thereto, a rocker hung loosely upon and movable relative said platform for imposing the lifting effort upon the platform by rocking coaction therewith, said rocker having a curved side for rocking engagement with the bottom of the platform, said curved side shifting its engagement with the platform continuously toward the platform pivot over the entire platform lifting operation to continuously shorten the distance from the platform. pivot on the frame te the rocking engagement of the rocker With the platform, means for actuating said rocker, keeper means on the rocker for holding the platform against tilting back over rearwardly at the limit of its tilting movement and for locating the rocker on the platform, andv pin means on the platformv projecting into said keeper means and having orbital movement therein.

2'. In combination, a frame, a platform pivoted thereto, a rocker hung loosely upon and movable relative said platform for imposing the lifting effort upon the platform by rocking coaction therewith, said rocker having a curved side for rocking engagement Withv the bottom of the platform, said curved side shifting its engagement with the platform continuously toward the platform pivot over the entire platform lifting operation to continuously shorten the distance from the platform pivot on the frame to the rocking engagement of the rocker With the platform, means for actuating said rocker, means on the platform for preventing relative-transverse displacement between platform and rocker, complementary and successively engaged means on platform and rocker Afor holding the rocker positioned With reference to the platform, keeper means on the rocker, and pin means projecting from the platform into said keeper means and having orbital movement therein.

3. In combination, a vehicle frame, a tilting body pivoted thereto, a gear journalled on the frame, a straight rack meshing `With said gear and actuated thereby, a rocker connected with said rack and actuated by said rack, saidV rocker having a rounded surface for coaction with the tilting body to apply a lifting effort thereto and to shift the application of the lifting effort along the bodyA to decrease the leverage and in*- crease the speed of tilting action as the body rises, the body having a series of spaced apertures, a series of projections extending from the rounded surface of said rack and successively engageable in said apertures, and an inverted channel on the body for receiving said rocker.

4. In combination, a vehicle frame, a tilting body pivoted thereto, a gear `iournalled on the frame, a straight rack meshing With said gear and actuated thereby, a rocker connected with said rack and actuated by said rack, said rocker having a rounded surface for coaction With the tilting body to apply a lifting effort thereto and to shift the application of the lifting effort along the body to decrease the leverage and increase the speed o-f tilting action as the body rises, a keeper on the rocker and a pin projecting from the body intov said keeper and having orbital movement therein.

5. In combination, a frame, a body pivoted on said frame, means for tilting said body about its pivot on the frame to discharge the contents from said body, said means comprising a rocker hung loosely upon said body andy movable relative thereto, said rocker being shiftable to and from the body 'I at its loose hanging connection with the body andy from end to end, one end of said rocker initially engaging the bottom of the body, and the opposite end being initially spaced from and out of engagement with the body with the spacing between said rocker and body continuously increasing from the body engaging end to the opposite end of the rocker, and the loose hanging of the rocker upon the body permitting the initially engaged end of the rocker to move from engagement with the body and the opposite end of the rocker toward engagement with the body with a continuous shifting of the engagement of the rocker With the body longitudinally along the bottom of the body toward the pivot on the frame for continuously shortening the distance from the pivot to the rocking engagement of the rocker with the body, said continuously shifting engagement of the rocker with the bod-y being from one end of the rocker to the other end and over the entire tiltin movement of the body.

G. In combination, a frame, a body pivoted on said frame, means for tilting said body about its pivot on the frame to discharge the contents from said body, said means comprising a rocker hung loosely upon said body and movable relative thereto, said rocker being shiftable to and from the body at its hanging connection with the body and from end to end, one end of said rocker initially engaging the bottom of the body, and the opposite end being initially spaced from and out of engagement with the bodv With the spacing between said rocker and body continuously increasing fioni the body engaging end to the opposite end of the rocker, the loose hanging of the rocker upon the body permitting the initially engaged end of the rocker to move from engagement Wit-h the body and the opposite end of the rocker toward engagement with the body with a continuous shifting of the engagement of the rocker with the body longitudinally along the bottom of the body toward the pivot on the frame for continuously shortening the distance from the pivot to the rocking engagement of the rocker with the body, said continuously shifting engagement of the rocker with the body being from one end of the rocker to the other and over the entire tilting movement of the body, and means for actuating said rocker.

7. In combination, a frame, a body pivoted on said frame, means for tilting said body about its pivot on the frame to dischargethe contents from said body, said means comprising a rocker hung loosely f upon said body Vand movable relative thereto, said rocker being shiftable to and from the body at its hanging connection with the body and from end to end,vone end of said rocker initially engaging the bottom of the body, and the opposite end being initially `spaced from and out of engagement with the body with the spacing between `said rocker and body continuously increasing from the body engaging end to the opposite end of the rocker, the loose hanging of the rocker upon the body permitting the initially engaged end of the rocker to move from engagement with the body and the opposite end of the rocker toward engagementy with the body with a continuous shifting of the engagement of the rocker with the body longitudinally along the bottom of the body Ytowardthe pivot on the frame for continuoted on saidv frame, means for tilting said body about its pivot on the frame to discharge the contents from said body, said means comprising a rocker hung loosely upon said body and movable relative thereto, said rocker being shiftable to and from the'body at its hanging connection with the .body and from end to end, one end of said rocker initially engaging the bottom of the body, and the opposite end being kinitially spaced from and out of engagement with the body with the spacing between said rocker and body continuously increasing from the body engaging end to the opposite end of the rocker, the loose hanging of the rocker upon the body permitting the initially engaged end 0I" the rocker to move from engagement with the body and the opposite end of the rocker toward engagement with the body with a continuous shifting of the engagement of the rocker with the body longitudinally along the bottom of the body toward thepivot on the frame for continuously shortening the distance from the pivot to the rocking engagement of the rocker Vwith the body, said continuously shifting engagement of the rocker with the body being from one end of the rocker to the other and over the entire tilting movement of the body, and means for limiting the tilting of the body andV for holding the body against tilting back over rearwardly at the limit of its tilting movement upon the frame.

9. In combination, a frame, a body pivoted on said frame, means for tilting said `upon said body and movable relative thereto, said rocker being shiltable to and from the body at` its hanging connection with the body and from end to end, one end of said rockerL initially engaging the bottom of the body, and the opposite end being initially spaced from and out of engagevment with the body with the spacing between said rocker and body continuously increasing roni the body engaging end to the opposite end of the rocker, the loose hanging of the rocker upon the body Vpei'- mitting the initially engaged end of the rocker to niove from engagement with the body and the opposite end of the rocker toward engagement with the body with a continuous shifting of the engagement of the rocker with the body longitudinally along the bottom of the body toward the pivot on the frame for continuously shortening the distance from the pivot to the rocking engagement of the rocker with the body, said continuously shifting engagement of the rocker with the body being from one end of the rocker to the other end and over the entire tilting movement of the body, and means on the body for preventing relative transverse displacement between the body and the rocker.

l0. In combination, a frame, a body pivoted on said frame, means for tilting said body about its pivot on the frame to discharge the contents from said body, said means comprising a rocker hung loosely upon said body and movable relative thereto, said rocker being shiftable to and from the body at its hanging connection with the body and from end to end, one end of said rocker initially engaging the bottom of the body, and the opposite end being initially spaced from and out of engagement with the body with the spacing between said rocker and body continuously increasing from the body engaging end to the opposite end of the rocker, the loose hanging Yof the rocker upon the body lpermitting the initially engaged end of the rocker to; move from engagement with the body and Jthe'opposite end of the rocker toward engagement with the body with a continuous shifting of the engagement of the rocker with the body longitudinally along the bottom of the body toward the pivot on the frame for continuously shortening the distance from the pivot to theV rocking engagement of the rocker with the body, said continuously shifting engagement of the rocker withthc body being from ,one end of the rocker to the other and over the entire tilting movement of the body, and means for holding the rocker positioned with vreference to the body. Y

l1. In combination, a frame, a body pivoted on said frame, means for tilting body about its pivol: on the trame to discharge the contents 'from said body7 said means comprising a rocker hung loosely' 7Lipon said body and movable relative thereto, said rocker beingshittabie to and from the body at its hanging connection with the body and from end to end, one end o said roolier initially engaging he botoin of the body, and the opposite end being initiaiiy spaced from and out of engagement with the body with the spacing between said. 'rocker and body continuously increasing from the body Yngaging end to 'the opposi the loose hanging r cher upon the body permitting the initialiy bl the rocker to move from engagement with the body and the opposite d or" the rocker en toward engagement with the body with a continuously shitting engagement of rocker with the body along the rocker from the initially engaged end to the oppo d of the rocker tor the purpose of continuously shifting the engagement with the body from one end to the other and over the entire ti ment of the body, means for actuat i rocker, said rocker actuating moms compr ing a straight rack connected n i. er, and a gear journaled upon the meshing with said rach ior actuat rocker.

12. In combination, a frame. a body pivoted on said traine, means for tilting said body about its pivot on the traine to discharge the contents from said body, said means coinprising a rocker hung ioosely upon said body and movable relative thereto, said rocker being sliiftable to and from the body at it hanging connection with the body and from end to end, one end oi" said rocker initially engaging the bottom oi the body, and 'the opposite end being initially spaced from and ont of engagement With the body with the spacing between said richer and body lll 'continuously increasing trom the body engaging end to the opposite end of the rocker, and the loose hanging of the rocker upon the body permitting the initially engaged end oli' therocker to move `from engagement With the body and the opposite end of the roel-:er toward engagement with the body with a continuons shifting oit the engagement of the rocker with the body longitudinally along the bottom oi the body toward the pivot on the frame Ylor continuously shortening the distance from the pivot to the rocking engagement of the rocker with the body. said continuously shifting engagement of the rocker with the body being from one end ot the rocker to the other end and over the entire tilting movement of the body, said rocker having its body engaging edge rounded.

1S'. In combination, a frame, a body pivoted on said frame, means for tilting said body about its pivot on the frame for discharging the contents from the body, said means comprising a pair of rockers hung loosely upon said body and moi/'able rela- 'rockers to move from engagement with the body and the opposite ends oiPA the rockers toward engagement with the body with a continuously shi Tg engagement oit the rochers with the body along the rockers :ai their initiaiiy engaged ends to their opposite` ends for the purpose ot continually sliii with the body 'from one end of each rocker the eppoi` le end and over the entire tilting movement of the body, means for actuating said rockers, said rocker actuating means comprising straight rack connected" ivitli each rocher, a cross shaft mounted on the frame and a pair of gears on said shaft and meshing with each said racks for actuating said rockers.

Ll. In combination, a frame, a body pivoted on said frame, moans for tilting said body about its pivot on said frame for dischargingtlie contents from the body, said 'means comprising a generally L-shaped member hung loosely upon the body and movable relative thereto, one leg of said generally L-shaped member forming a rocker having one end adapted for initially engaging the bottom of the body and the opposite end spaced from and out ol engagement with the body ivitli the spacing between said rocker and body continuously increasing from the body engaging end to the opposite end of the rocker, the loose hanging of said generally L-shaped member upon the body permitting the initially engaged end of the rocker to move from engagement with the body and the opposite end of the rocker to- Ward engagement with the body with a continuously shifting engagement oiLl the rocker With the body along the rocker from the initially engaged end to the opposite end for tlie purpose of continuously shifting the engagement of the rocker with the body from one end of the rocker to the other and over the entire tilting movement of the body and the other leg of said generally L-shaped member forming a straight rack for actuating said rocker, an actuating gear meshing with said rack7 means Jfor limit-ing moveing the bottom of the body and the oppo-" the engagement of the rockers '1 ioo ment of the body and for holding the body against tilting back over rearwardly at the limit of its tilting movement upon the frame, and means on the body for preventing relative transverse displacement between the body and rocker.

15. In combination, a vehicle frame, Va tilting body pivoted thereto, a rotary element carried by said frame, a reciprocable member operable by said element, and a rocker associated With said member and movable thereby, said rocker having a surface coacting with said body to apply up- Ward pressure thereto at points progressing along said body to decrease the leverage and increase the speed loi tilting as the body rises.

16. In combination, a vehicle frame, a tilting body pivoted thereto, a pinion rotatably supported upon said -trame, a reciprocable rack movable by said pinion, and a rocker formed integral With said rack and movable thereby, said rocker having a sur- Vface coacting With said body to apply upward pressure thereto at points progressing along said body to decrease the leverage and increase the speed of tilting as the body rises. c Y

17. In combination, a vehicle frame, a tilting body pivoted to the rear portion of said frame, a pinion rotatably supported by said frame, a reeiprooable straight rack operable by said pinion, means for maintaining said rack in engagement with said pinion lWhile permitting oscillation of said rack, and a rocker formed integral with said rack Y and movable thereby, said rocker having a surface coacting With said body to apply up- Ward pressure thereto at Vpoints progressing along said body to decrease the leverage and increase the speed of tilting as the body rises.

In Witness whereof, I hereunto subscribe my name thisrSth day of November, 1928.

EUGENE J; DONDLINGER. 

